A Fresnel lens is a type of compact lens originally developed by French physicist Augustin-Jean Fresnel for lighthouses. The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional...

Fresnel lenses are a type of compact lens originally designed by French physicist Augustin-Jean Fresnel for lighthouses, which allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional...

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